DELTA DVP48EH00T3 EH3 Series Standard High-Performance PLC Main Unit

Product Overview

The DVP48EH00T3 (DVP48EH00T3) is a high-performance programmable logic controller (PLC) main processing unit belonging to Delta’s flagship DVP-EH series. Featuring a dense 48-point I/O layout configuration, this AC-powered base controller is equipped with fast transistor outputs tailored for high-speed positioning and precise motion tracking loops.

Engineered for complex industrial automation infrastructure—such as multi-axis welding cells, high-speed textile machinery, automated bottling plants, and precision flying-shear systems—the unit boasts dual-core processing capabilities. By separating core ladder logic execution from complex motion control calculations, the CPU achieves stable operation, eliminating execution delays and dropping unexpected micro-stoppages to safeguard continuous plant uptime.

Technical Architecture and System Configuration

The DVP48EH00T3 is designated as an AC Input H-Type main unit, built to operate reliably on standard industrial AC power lines while offering enhanced hardware protection against transient line drops and surge noise. The 48 physical I/O layout is divided into high-density digital input channels and fast-response transistor output channels.

The underlying hardware platform integrates high-speed hardware counters and specialized pulse output registers capable of driving servo or stepper motor amplifiers directly without auxiliary communication modules. Featuring standard RS232 and RS485 communication interfaces running the industrial Modbus protocol, the base unit integrates into existing SCADA networks and HMI clusters, requiring no standalone network adapter hardware.

Technical Specifications

Product FAQs

Can this transistor-output PLC drive high-voltage AC solenoids directly?

No. Transistor outputs are designed exclusively for low-voltage DC signals (typically 5 to 30 VDC) and are engineered for high-frequency switching or high-speed pulse generation. Connecting an AC inductive load directly to a transistor point will cause thermal breakdown of the internal switching component. For high-voltage AC loads, route the transistor output to drive an intermediate interface relay or optocoupler.

What is the functional advantage of the EH3 series "H-Type" AC input classification?

The H-Type designation specifies an upgraded, heavy-duty internal switched-mode power supply block. This architecture offers superior noise immunity against high-frequency electromagnetic interference (EMI) on the factory power grid and provides a longer hold-up time during brief voltage sags or line dropouts, preventing unnecessary CPU resets.

Does the DVP48EH00T3 support closed-loop encoder feedback calculations?

Yes. The EH3 CPU incorporates hardware-driven high-speed counters that can process raw A/B phase differential signals coming from rotary encoders. These counters run independently of the cyclic ladder scan time, providing accurate positioning loop calculations for high-speed cutting or sorting applications.

Field Engineering and Enclosure Installation Guidelines

• Thermal Isolation and Air Cleaving: Secure the PLC horizontally onto a standard 35 mm DIN rail conforming to EN 60715. Maintain a minimum open space of 50 mm above and below the housing structure and 20 mm on both sides. Avoid installing the PLC directly above heat-producing equipment such as variable frequency drives (VFDs) or large transformer blocks to preserve passive air cooling through the casing ventilation slots.

• Power Distribution and Surge Suppression: Connect incoming AC power lines strictly to the designated L and N terminals. Connect the field ground wire to the dedicated PE terminal using a low-impedance grounding strap tied straight to the primary panel ground bus. Ensure that the 24 VDC sensor power output terminal is loaded strictly within factory current thresholds to avoid triggering internal short-circuit protection circuits.

• Transistor Wiring and Noise Filtering: When wiring inductive DC loads (such as 24 VDC relay coils or clutch solenoids) to the NPN transistor outputs, always install a freewheeling diode (e.g., 1N4007) in parallel with the load coil, placed as close to the load as possible. This configuration safely clamps high-voltage inductive flyback spikes generated during channel turn-off, protecting the PLC transistor output from progressive degradation.